<?php
/*
 * This file belongs to the YIT Framework.
 *
 * This source file is subject to the GNU GENERAL PUBLIC LICENSE (GPL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://www.gnu.org/licenses/gpl-3.0.txt
 */
if ( ! defined( 'ABSPATH' ) ) {
    exit;
} // Exit if accessed directly

if ( ! class_exists( 'YIT_Upgrade' ) ) {
    /**
     * YIT Upgrade
     *
     * Notify and Update plugin
     *
     * @class       YIT_Upgrade
     * @package     Yithemes
     * @since       1.0
     * @author      Your Inspiration Themes
     * @see         WP_Updater Class
     */

    class YIT_Upgrade {

        /**
         * @var string XML notifier update
         */
        protected $_xml = 'http://update.yithemes.com/plugins/%plugin_slug%.xml';

        /**
         * @var string api server url
         */
        protected $_package_url = 'http://www.yithemes.com';

        /**
         * @var array The registered plugins
         */
        protected $_plugins = array();

        /**
         * @var YIT_Upgrade The main instance
         */
        protected static $_instance;

        /**
         * Construct
         *
         * @author Andrea Grillo <andrea.grillo@yithemes.com>
         * @since 1.0
         */
        public function __construct() {
            add_filter( 'upgrader_pre_download', array( $this, 'upgrader_pre_download') , 10, 3 );
            add_action( 'update-custom_upgrade-plugin-multisite', array( $this, 'upgrade_plugin_multisite' ) );

            if( is_network_admin() ){
                add_action( 'admin_enqueue_scripts', array( $this, 'network_admin_enqueue_scripts' ) );
            }

            if( defined( 'YIT_LICENCE_DEBUG' ) && YIT_LICENCE_DEBUG ){
                $this->_package_url = 'http://dev.yithemes.com';                
            }
        }

        /**
         * Main plugin Instance
         *
         * @param $plugin_slug | string The plugin slug
         * @param $plugin_init | string The plugin init file
         *
         * @return void
         *
         * @since  1.0
         * @author Andrea Grillo <andrea.grillo@yithemes.com>
         */
        public function register( $plugin_slug, $plugin_init ) {

            if( ! function_exists( 'get_plugins' ) ){
                include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
            }

            $plugins     = get_plugins();
            $plugin_info = $plugins[ $plugin_init ];

            $this->_plugins[ $plugin_init ] = array(
                'info' => $plugin_info,
                'slug' => $plugin_slug,
            );

            /* === HOOKS === */
            if( ! is_multisite() || is_plugin_active_for_network( $plugin_init ) ){
                add_action( 'admin_init', array( $this, 'remove_wp_plugin_update_row' ), 15 );
                add_filter( 'pre_set_site_transient_update_plugins', array( $this, 'check_update' ) );
            } else if( is_multisite() && current_user_can( 'update_plugins' ) ) {
                $xml                = str_replace( '%plugin_slug%', $plugin_slug, $this->_xml ); 
                $remote_xml         = wp_remote_get( $xml );

                if( ! is_wp_error( $remote_xml ) && isset( $remote_xml['response']['code'] ) && '200' == $remote_xml['response']['code'] ) {
                    $plugin_remote_info                                     = new SimpleXmlElement( $remote_xml['body'] );
                    $this->_plugins[ $plugin_init ]['info']['Latest']       = (string) $plugin_remote_info->latest;
                    $this->_plugins[ $plugin_init ]['info']['changelog']    = (string) $plugin_remote_info->changelog;
                    add_action( 'admin_enqueue_scripts', array( $this, 'multisite_updater_script' ) );
                }
            }
        }

        /**
         * Add the multisite updater scripts
         *
         * @return void
         *
         * @since    1.0
         * @author   Andrea Grillo <andrea.grillo@yithemes.com>
         */
        public function multisite_updater_script(){

            $update_url = array();
            $changelogs = array();
            $strings    = array(
                'new_version'   => __( 'There is a new version of %plugin_name% available.', 'yith-plugin-fw' ),
                'latest'        => __( 'View version %latest% details.',  'yith-plugin-fw' ),
                'unavailable'   => __( 'Automatic update is unavailable for this plugin,',  'yith-plugin-fw' ),
                'activate'      => __( 'please <a href="%activate_link%">activate</a> your copy of %plugin_name%.',  'yith-plugin-fw' ),
                'update_now'    => __( 'Update now.',  'yith-plugin-fw' )

            );

            foreach( $this->_plugins as $init => $info ){
                YIT_Plugin_Licence()->check( $init );

                $update_url[ $init ]    = wp_nonce_url( self_admin_url('update.php?action=upgrade-plugin-multisite&plugin=') . $init, 'upgrade-plugin-multisite_' . $init );
                $changelog_id           = str_replace( array( '/', '.php', '.' ), array( '-', '', '-' ), $init );
                $details_url[ $init ]   = '#TB_inline' . esc_url( add_query_arg( array( 'width' => 722, 'height' => 914, 'inlineId' => $changelog_id ) , '' ) );
                $changelogs[ $init ]    = $this->in_theme_update_message( $this->_plugins[ $init ], $this->_plugins[ $init ]['info']['changelog'], $changelog_id, false );
            }

            $localize_script_args = array(
                'registered'                => $this->_plugins,
                'activated'                 => YIT_Plugin_Licence()->get_activated_products(),
                'licence_activation_url'    => YIT_Plugin_Licence()->get_licence_activation_page_url(),
                'update_url'                => $update_url,
                'details_url'               => $details_url,
                'strings'                   => $strings,
                'changelogs'                => $changelogs
            );

            yit_enqueue_script( 'yit-multisite-updater', YIT_CORE_PLUGIN_URL . '/assets/js/multisite-updater.min.js', array( 'jquery' ), false, true  );

            wp_localize_script( 'yit-multisite-updater', 'plugins', $localize_script_args );
        }

        public function network_admin_enqueue_scripts(){
            yit_enqueue_style( 'yit-upgrader', YIT_CORE_PLUGIN_URL . '/assets/css/yit-upgrader.css' );
        }

        /**
         * Call the protected method _upgrader_pre_download to retrive the zip package file
         *
         * @param bool         $reply          Whether to bail without returning the package. Default false.
         * @param string       $package        The package file name.
         * @param \WP_Upgrader $upgrader       WP_Upgrader instance.
         *
         * @return string | The download file
         *
         * @since    1.0
         * @see      wp-admin/includes/class-wp-upgrader.php
         * @access  public
         * @author   Andrea Grillo <andrea.grillo@yithemes.com>
         */
        public function upgrader_pre_download( $reply, $package, $upgrader ){
            return $this->_upgrader_pre_download( $reply, $package, $upgrader );
        }

        /**
         * Retrive the zip package file
         *
         * @param bool         $reply          Whether to bail without returning the package. Default false.
         * @param string       $package        The package file name.
         * @param \WP_Upgrader $upgrader       WP_Upgrader instance.
         *
         * @return string | The download file
         *
         * @since    1.0
         * @see      wp-admin/includes/class-wp-upgrader.php
         * @access  protected
         * @author   Andrea Grillo <andrea.grillo@yithemes.com>
         */
        protected function _upgrader_pre_download( $reply, $package, $upgrader ) {

            /**
             * It isn't YITH Premium plugins, please wordpress update it for me!
             */
            if( ! isset( $upgrader->skin->plugin ) ) {
                return $reply;
            }
                
             $plugin_info = YIT_Plugin_Licence()->get_product( $upgrader->skin->plugin );

            /**
             * False ? It isn't YITH Premium plugins, please wordpress update it for me!
             */
            if( false === $plugin_info ) {
                return $reply;
            }

            $licence    = YIT_Plugin_Licence()->get_licence();
            $product_id = $plugin_info['product_id'];
            $args       = array(
                'email'       => $licence[ $product_id ]['email'],
                'licence_key' => $licence[$product_id]['licence_key'],
                'product_id'  => $plugin_info['product_id'],
                'secret_key'  => $plugin_info['secret_key'],
                'instance'    => YIT_Plugin_Licence()->get_home_url(),
                'wc-api'      => 'download-api',
                'request'     => 'download'
            );

            if ( ! preg_match( '!^(http|https|ftp)://!i', $package ) && file_exists( $package ) ) {
            //Local file or remote?
                return $package;
            }

            if ( empty( $package ) ) {
                return new WP_Error( 'no_package', $upgrader->strings['no_package'] );
            }

            $upgrader->skin->feedback( 'downloading_package', __( 'Yithemes Repository', 'yith-plugin-fw' ) );

            $download_file = $this->_download_url( $package, $args );

            /**
             * Regenerate update_plugins transient
             */
            $this->force_regenerate_update_transient();

            if ( is_wp_error( $download_file ) ) {
                return new WP_Error( 'download_failed', $upgrader->strings['download_failed'], $download_file->get_error_message() );
            }

            return $download_file;
        }

        /**
         * Retrive the temp filename
         *
         * @param string $url      The package url
         * @param string $body     The post data fields
         * @param int    $timeout  Execution timeout (default: 300)
         *
         * @return string | The temp filename
         *
         * @since    1.0
         * @see      wp-admin/includes/class-wp-upgrader.php
         * @access  protected
         * @author   Andrea Grillo <andrea.grillo@yithemes.com>
         */
        protected function _download_url( $url, $body, $timeout = 300 ) {

            //WARNING: The file is not automatically deleted, The script must unlink() the file.
            if ( ! $url ) {
                return new WP_Error( 'http_no_url', __( 'Invalid URL Provided.' ) );
            }

            $tmpfname = wp_tempnam( $url );

            $args = array(
                'timeout'  => $timeout,
                'stream'   => true,
                'filename' => $tmpfname,
                'body'     => $body
            );

            if ( ! $tmpfname ) {
                return new WP_Error( 'http_no_file', __( 'Could not create Temporary file.' ) );
            }

            $response = wp_safe_remote_post( $url, $args );

            if ( is_wp_error( $response ) ) {
                unlink( $tmpfname );
                return $response;
            }

            if ( 200 != wp_remote_retrieve_response_code( $response ) ) {
                unlink( $tmpfname );
                return new WP_Error( 'http_404', trim( wp_remote_retrieve_response_message( $response ) ) );
            }

            $content_md5 = wp_remote_retrieve_header( $response, 'content-md5' );

            if ( $content_md5 ) {
                $md5_check = verify_file_md5( $tmpfname, $content_md5 );
                if ( is_wp_error( $md5_check ) ) {
                    unlink( $tmpfname );
                    return $md5_check;
                }
            }

            return $tmpfname;
        }

        /**
         * Main plugin Instance
         *
         * @static
         * @return object Main instance
         *
         * @since  1.0
         * @author Andrea Grillo <andrea.grillo@yithemes.com>
         */
        public static function instance() {
            if ( is_null( self::$_instance ) ) {
                self::$_instance = new self();
            }

            return self::$_instance;
        }

         /**
         * Delete the update plugins transient
         *
         * @return void
         *
         * @since  1.0
         * @see update_plugins transient and pre_set_site_transient_update_plugins hooks
         * @author Andrea Grillo <andrea.grillo@yithemes.com>
         */
        public function force_regenerate_update_transient(){
            delete_site_transient( 'update_plugins' );
        }

        /**
         * Check for plugins update
         *
         * If a new plugin version is available set it in the pre_set_site_transient_update_plugins hooks
         *
         * @param mixed $transient | update_plugins transient value
         * @param bool  $save      | Default: false. Set true to regenerate the update_transient plugins
         *
         * @return mixed $transient | The new update_plugins transient value
         *
         * @since  1.0
         * @see    update_plugins transient and pre_set_site_transient_update_plugins hooks
         * @author Andrea Grillo <andrea.grillo@yithemes.com>
         */
        public function check_update( $transient, $save = false ) {

            foreach ($this->_plugins as $init => $plugin) {
                $xml = str_replace('%plugin_slug%', $this->_plugins[$init]['slug'], $this->_xml);
                $remote_xml = wp_remote_get($xml);

                if (!is_wp_error($remote_xml) && isset($remote_xml['response']['code']) && '200' == $remote_xml['response']['code']) {


                    $plugin_remote_info = new SimpleXmlElement($remote_xml['body']);

                    if (version_compare($plugin_remote_info->latest, $plugin['info']['Version'], '>') && !isset($transient->response[$init])) {

                        $package = YIT_Plugin_Licence()->check($init) ? $this->_package_url : null;

                        $obj = new stdClass();
                        $obj->slug = (string)$init;
                        $obj->new_version = (string)$plugin_remote_info->latest;
                        $obj->changelog = (string)$plugin_remote_info->changelog;
                        $obj->package = $package;
                        $obj->plugin      = $init;
                        $transient->response[$init] = $obj;
                    }

                }
            }

            if( $save ) {
                set_site_transient( 'update_plugins', $transient );
            }

            return $transient;
        }

        /**
         * Add the plugin update row in plugin page
         *
         * @return void
         * @fire "in_theme_update_message-{$init}" action
         *
         * @since    1.0
         * @see      after_plugin_row_{$init} action
         * @author   Andrea Grillo <andrea.grillo@yithemes.com>
         */
        public function plugin_update_row() {

            $current    = get_site_transient( 'update_plugins' );
            $init       = str_replace( 'after_plugin_row_', '', current_filter() );

            if ( ! isset( $current->response[ $init ] ) ) {
                return false;
            }

            /**
             * stdClass Object
             */
            $r = $current->response[ $init ];

            $changelog_id   = str_replace( array( '/', '.php', '.' ), array( '-', '', '-' ), $init );
            $details_url    = '#TB_inline' . esc_url( add_query_arg( array( 'width' => 722, 'height' => 914, 'inlineId' => $changelog_id ) , '' ) );

            /**
             * @see wp_plugin_update_rows() in wp-single\wp-admin\includes\update.php
             */
            $wp_list_table = _get_list_table( 'WP_MS_Themes_List_Table' );

            if( is_network_admin() || ! is_multisite() || true ) {
                echo '<tr class="plugin-update-tr"><td colspan="' . $wp_list_table->get_column_count() . '" class="plugin-update colspanchange"><div class="update-message">';

                if( ! current_user_can( 'update_plugins' ) ){
                    printf( __('There is a new version of %1$s available. <a href="%2$s" class="thickbox yit-changelog-button" title="%3$s">View version %4$s details</a>.', 'yith-plugin-fw'), $this->_plugins[ $init ]['info']['Name'], esc_url( $details_url ), esc_attr( $this->_plugins[ $init ]['info']['Name'] ), $r->new_version );
                }elseif( is_plugin_active_for_network( $init ) ){
                    printf( __( 'There is a new version of %1$s available. <a href="%2$s" class="thickbox yit-changelog-button" title="%3$s">View version %4$s details</a>. <em>You have to activate the plugin on a single site of the network to benefit from automatic updates.</em>', 'yith-plugin-fw' ), $this->_plugins[ $init ]['info']['Name'], esc_url( $details_url ), esc_attr( $this->_plugins[ $init ]['info']['Name'] ), $r->new_version );
                }elseif ( empty( $r->package ) ) {
                    printf( __( 'There is a new version of %1$s available. <a href="%2$s" class="thickbox yit-changelog-button" title="%3$s">View version %4$s details</a>. <em>Automatic update is unavailable for this plugin, please <a href="%5$s" title="Licence activation">activate</a> your copy of %6s.</em>', 'yith-plugin-fw' ), $this->_plugins[ $init ]['info']['Name'], esc_url( $details_url ), esc_attr( $this->_plugins[ $init ]['info']['Name'] ), $r->new_version, YIT_Plugin_Licence()->get_licence_activation_page_url(), $this->_plugins[ $init ]['info']['Name'] );
                } else {
                    printf( __('There is a new version of %1$s available. <a href="%2$s" class="thickbox yit-changelog-button" title="%3$s">View version %4$s details</a> or <a href="%5$s">update now</a>.', 'yith-plugin-fw'), $this->_plugins[ $init ]['info']['Name'], esc_url($details_url), esc_attr( $this->_plugins[ $init ]['info']['Name'] ), $r->new_version, wp_nonce_url( self_admin_url('update.php?action=upgrade-plugin&plugin=') . $init, 'upgrade-plugin_' . $init ) );
                }

                /**
                 * Fires at the end of the update message container in each
                 * row of the themes list table.
                 *
                 * The dynamic portion of the hook name, `$theme_key`, refers to
                 * the theme slug as found in the WordPress.org themes repository.
                 *
                 * @since Wordpress 3.1.0
                 * }
                 */
                do_action( "in_theme_update_message-{$init}", $this->_plugins[ $init ], $r->changelog, $changelog_id );

                echo '</div></td></tr>';
            }
        }

        /**
         * Remove the standard plugin_update_row
         *
         * Remove the standard plugin_update_row and Add a custom plugin update row in plugin page.
         *
         * @return void
         * @fire "in_theme_update_message-{$init}" action
         *
         * @since    1.0
         * @see      after_plugin_row_{$init} action
         * @author   Andrea Grillo <andrea.grillo@yithemes.com>
         */
        public function remove_wp_plugin_update_row() {
            foreach( $this->_plugins as $init => $plugin ){
                remove_action( "after_plugin_row_{$init}", 'wp_plugin_update_row', 10, 2 );
                add_action( "after_plugin_row_{$init}", array( $this, 'plugin_update_row' ) );
                add_action( "in_theme_update_message-{$init}", array( $this, 'in_theme_update_message' ), 10, 3 );
            }
        }

        public function in_theme_update_message( $plugin, $changelog, $changelog_id, $echo = true ){

            $res = "<div id='{$changelog_id}' class='yit-plugin-changelog-wrapper'>
                    <div class='yit-plugin-changelog'>
                        <h2 class='yit-plugin-changelog-title'>{$plugin['info']['Name']} - Changelog</h2>
                        <p>{$changelog}</p>
                    </div>
                </div>";

            if( $echo ){
                echo $res;
            }
            else{
                return $res;
            }
        }

        /**
         * Auto-Update Plugin in multisite
         *
         * Manage the non standard upgrade-plugin-multisite action
         *
         * @return void
         *
         * @since    1.0
         * @see      upgrade-plugin action
         * @author   Andrea Grillo <andrea.grillo@yithemes.com>
         */
        public function upgrade_plugin_multisite(){

            $plugin = isset($_REQUEST['plugin']) ? trim($_REQUEST['plugin']) : '';
            $action = isset($_REQUEST['action']) ? $_REQUEST['action'] : '';

            if( 'upgrade-plugin-multisite' != $action ){
                wp_die( __( 'You can\'t update the plugins for this site.', 'yith-plugin-fw' ) );
            }

            if ( ! current_user_can( 'update_plugins' ) ) {
                wp_die( __( 'You do not have sufficient permissions to update the plugins for this site.', 'yith-plugin-fw' ) );
            }

            $this->check_update( get_site_transient( 'update_plugins') , true );

            check_admin_referer( 'upgrade-plugin-multisite_' . $plugin );

            $title        = __( 'Update Plugin' );
            $parent_file  = 'plugins.php';
            $submenu_file = 'plugins.php';

            wp_enqueue_script( 'updates' );
            require_once( ABSPATH . 'wp-admin/admin-header.php' );

            $nonce = 'upgrade-plugin-multisite_' . $plugin;
            $url   = 'update.php?action=upgrade-plugin-multisite&plugin=' . urlencode( $plugin );

            $upgrader = new Plugin_Upgrader( new Plugin_Upgrader_Skin( compact( 'title', 'nonce', 'url', 'plugin' ) ) );
            $upgrader->upgrade( $plugin );

            include( ABSPATH . 'wp-admin/admin-footer.php' );
        }
    }
}

if ( ! function_exists( 'YIT_Upgrade' ) ) {
    /**
     * Main instance of plugin
     *
     * @return object
     * @since  1.0
     * @author Andrea Grillo <andrea.grillo@yithemes.com>
     */
    function YIT_Upgrade() {
        return YIT_Upgrade::instance();
    }
}

/**
 * Instance a YIT_Upgrade object
 */
YIT_Upgrade();
